All Things Mk5 > Performance Modifications
Intercooler Recommendation
Pummy:
Run the S3 cooler as an upgrade on the original and go twincooler. Despite the surface area of the APR cooler being higher (this is based on the comments above about the fins) the volume of compressed air which is exposed to cooled surfaces before being run to the inlet would appear to be higher thus leading to a better cooling efficiency. Validated results on the S3 cooler alone from a VAG COM test by djhorace would lead me to believe 1/3 to 1/4 increase in cooling. I am happy to stand corrected, as I am quoting this all from memory
cuprak1:
--- Quote from: Pummy on November 17, 2009, 09:07:06 pm ---Run the S3 cooler as an upgrade on the original and go twincooler. Despite the surface area of the APR cooler being higher (this is based on the comments above about the fins) the volume of compressed air which is exposed to cooled surfaces before being run to the inlet would appear to be higher thus leading to a better cooling efficiency. Validated results on the S3 cooler alone from a VAG COM test by djhorace would lead me to believe 1/3 to 1/4 increase in cooling. I am happy to stand corrected, as I am quoting this all from memory
--- End quote ---
nah thats about spot on pum, i was considering the THS, and got the s3 cooler as a stop gap, but seeing as the car is perfectly fine with it i cant see any reason to blow more money in that cooling department when the s3 one is suffice?
Pummy:
That is all fine and good for the UK climate but for those in hotter climates (like those greek Punto GT's that wanted more than the Saab 900 FMIC's :wink:) the S3 IC still needs something additional out front getting cold air before anything else gets some of the cooling. From that perspective the Twin system would be better. Despite the smaller size, the IC out front gets as cool as it can. Also the additional exposed surface area is what counts when it comes to Intercoolers. I cannot comment on the additional lag as I am not au fait with how much air is consumed at x pressure at x rpm to figure out the additional volume making an impact. At low rpm's it may be possible to introduce lag or pressure drops however I cannot validate that with facts.
xxx_mojo_xxx:
In the way of an update...I'm inclined towards the S3 intercooler - costs considered, etc. I'm not looking to go too crazy with the mods.
This brings me to the next bit...are they a b*tch to fit? What needs to be removed, and what bits do I need apart from the intercooler?
About the turbo lag - is this apparent with the S3 one? Still unclear how an intercooler can impact the turbo from spooling up (ref. turbo lag)?
cuprak1:
--- Quote from: xxx_mojo_xxx on November 18, 2009, 09:19:11 am ---In the way of an update...I'm inclined towards the S3 intercooler - costs considered, etc. I'm not looking to go too crazy with the mods.
This brings me to the next bit...are they a b*tch to fit? What needs to be removed, and what bits do I need apart from the intercooler?
About the turbo lag - is this apparent with the S3 one? Still unclear how an intercooler can impact the turbo from spooling up (ref. turbo lag)?
--- End quote ---
Its not too hard to fit, just need to take the front end off, you just need to be patient and take your time, the fitting is quite logical..
if you have a k03 though...
The OEM Turbo discharge transfer pipe part number 1K0 145 840 Q - does Not work with the Audi S3 Intercooler upgrade as the Intercooler entry side turbo hose has a different orientation of locking keyway.
This 'non working' transfer pipe is 'generally' fitted to (and therfore effects) later cars, typically MY 2006 onwards. However an actual inspection of the pipework type fitted to your car is always recomended as it is not easy to state what models have the 'Transfer Pipe that works' fitted by chassis look up.
once you know this then you can decide what to do..
also there is no lag atall on mine :S dont think thats an issue
cheers
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